Xiaomi Redmi 6 Pro is a popular device that requires maintenance over time, whether it’s replacing a failed battery or a broken rear window. Unlike flagship models with sealed cases, this device has a removable rear panel, which theoretically makes it easier to access internal components. However, the design is tightly executed, and inept actions can damage plastic latches or plumes.
Before disassembling the case, you need to prepare a workplace and a specialized tool. Ignoring the safety rules when working with lithium polymer batteries is unacceptable, as this can lead to fire. In this article, we will discuss in detail the process of dismantling the back cover, paying attention to the nuances of heating the glue and the sequence of disconnecting the plumes.
It is important to understand that self-interference in the design of the device can affect its tightness and appearance. If you are not confident in your abilities, it is better to contact the service center, but if you decide, follow the instructions as accurately as possible.
Tools and workplace preparation required
To successfully perform the battery or glass replacement procedure, you will need a minimal but specific set of tools. The use of improvised tools such as knives or needles is strictly prohibited, as there is a high risk of damage to the internal components or puncture of the battery. The main tool will be a plastic spatula (mediator) and a sucker that does not conduct electricity and does not scratch the body.
The second critical element is the heat source. The glue that holds the lid at room temperature is very hard, and trying to pick the panel out "cold" will cause it to break. Use a hair dryer or a special heating platform to soften the adhesive layer. The heating temperature should not exceed 80-90 degrees Celsius, so as not to melt the plastic elements of the structure.
⚠️ Warning: Before starting any work, be sure to turn off the device. Attempting to turn off the battery plume when power is on can cause the power controller to short circuit and fail.
You'll also need tweezers with curved ends for careful extraction of small parts and a Phillips screwdriver of small size. Be sure to prepare a screw container, as they can vary in length in different models, and confusing them means damaging the thread or piercing the body through the assembly.
☑️ The Redmi 6 Pro Discovery Tools
The process of heating and separation of the rear panel
The first step is to soften the adhesive layer around the perimeter of the device. Put the phone on a soft, heat-resistant surface with the screen down. Turn the dryer on to medium power and evenly warm the ends of the back cover. Keep the heat source at a distance of 3-5 centimeters, constantly moving it so as not to overheat one point. The entire heating process usually takes 2 to 4 minutes.
Once the case is warm to the touch (but not hot), apply a suction cup to the bottom of the back cover, closer to the logo or slightly lower. Pull the suction cup up, creating a small gap between the frame and the plastic. Insert a plastic spade gently into this gap. If the lid does not lend itself, do not use force - you better warm up the problem area again.
Move the shoulder blade along the perimeter, gradually cutting through the adhesive layer. Pay special attention to the corners and areas around the camera module, where the glue is often the most. The back cover is held not only by glue, but also by plastic latches that need to be carefully snapped, putting a tool on them.
The nuances of glue work
Once all sides are free, the lid should be easily removed. If you feel resistance, check if the fingerprint scanner or speaker plume is caught if they are glued to the lid. In the Redmi 6 Pro, the main plumes are on the motherboard, but there will be no rechecking.
Dismantling internal protection and disconnecting plumes
When you remove the back cover, you'll have access to the insides of your smartphone, and you'll immediately notice a metal plate or a plastic bar covering the motherboard, which is mounted with a few screws that you need to unscrew.
Under the safety bar are the main connectors. The first thing you need to do is turn off the battery plume. Use a plastic blade or nail to do this, gently putting the connector upwards. Don't pull the plume itself, it will cause it to break. Only after the battery is turned off can you safely work with other components.
- 🔋 Disconnect the main battery connector from the motherboard.
- 📱 Carefully disable the main camera module plume if it interferes with access.
- 🔊 Check the connection of the bottom speaker plume (loud communication) if it goes to the main board.
- 🔌 Inspect the antenna cable (yellow or black wire) going to the top of the case.
Then you have to take out the motherboard itself if you want to get a deep diagnosis, or just access the battery. In the Redmi 6 Pro, the battery takes up most of the space. It can also be glued to the frame, so it often requires reheating or the use of special dissolving liquids to extract it.
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When disconnecting the plumes, always use a dielectric tool (plastic, wood). Metal tweezers can accidentally close the contacts and burn the board, even if the device is turned off, since there is residual voltage on the battery.
Replacement of battery and batteries
The most common reason for disassembly is to replace a worn-out battery. In the Xiaomi Redmi 6 Pro, the battery has a capacity of 4000 mAh and the BM3J model. When removing an old battery, be extremely careful: lithium polymer batteries are afraid of punctures. If you damage the battery shell, it can smoke or catch fire.
The new battery is inserted into the compartment with contacts upwards (usually pointed towards the bottom of the phone). Before installing the new cell, it is recommended to clean the bed of old glue and dust. If the new battery comes without adhesive tape, you can use double-sided tape for phones, sliced strips.
Once the battery is installed, plug the plume into the motherboard. Don't rush to twist the screws, check if the phone is turning on first. Press the power button. If the screen catches fire and starts charging, the battery replacement is successful. If not, double-check the connector's landing density.
It's important to lay the antenna wire right, it has to lie in its gutters and be fixed with clamping slats, and if you don't fit the antenna cable properly, it's going to cause a dramatic deterioration in the quality of the communication and the operation of the Wi-Fi.
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The main criterion for successful replacement is a stable voltage and no battery heating in the first minutes of operation. If the phone warms or discharges quickly, a new battery or a problem in the controller may have been defective.
Installation of a new back cover and sealing
The final step is to assemble the device. If you've been changing broken glass, make sure the new back panel is clean and has already been glued. If there's no glue, apply a special B-7000 or E-6000 with a thin strip of glue around the perimeter or use pre-cut adhesives.
When you install the lid, first align the top with the camera module, then gently press the bottom. Press the entire perimeter evenly so that the glue catches. For better fixation, you can put the phone under a light load (for example, a stack of books) for 15-20 minutes, pre-wrap the device in a towel.
Don't forget to twist all the screws on the safety bar. If they don't, they can cause the connectors to move away when the phone falls and the device stops working. Check all the volume and on buttons -- they should have a clear click.
Once assembled, turn on your phone and check the basic functions: sensor, camera, microphone and speaker. If everything is working properly, the process can be considered complete. The sealability will not be factory-grade, but dust and spray protection will remain.
Typical errors and troubleshooting table
Even skilled craftsmen sometimes make mistakes when disassembling electronics, most often problems arise from rushing or using the wrong tools, for example, trying to lid a knife is almost guaranteed to damage the frame or glass.
Another common mistake is ignoring heat, and cold disassembly is a path to cracks, and it is also common to forget to turn off the battery before disconnecting other plumes, which can cause the backlight of the screen or the charge controller to fail.
| Problem. | Possible cause | Decision |
|---|---|---|
| Phone's off. | The battery plume is not connected. | Check the connector and charge the device |
| No network/wifi | The antenna cable's gone. | Relaying and pressing of the antenna |
| The sensor is not working. | Display plume damaged | Replacement of the display module |
| The lid is coming off. | Little glue or dirt | Clean the frame and re-adhere |